输入数值，得打完折的价格

哪里错了鸭？大神们，救救孩子吧😭

#include<stdio.h>
int main()
{
printf("请输入购货款:\n");
int x,y;
scanf("%d",&x);
switch(x)
{
case1:
case250: y=0.05x;break;
case500: y=0.075x;break;
case1000: y=0.1x;break;
case2000: y=0.15x;break;
default: y=x ;
}
printf("y=%d",y);
return 0;
}

case 和数字这么近干啥，，，